[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-30 Thread Zamundaaa 
https://bugs.kde.org/show_bug.cgi?id=504303

Zamundaaa  changed:

   What|Removed |Added

 Status|NEEDSINFO   |RESOLVED
 Resolution|WAITINGFORINFO  |UPSTREAM

--- Comment #7 from Zamundaaa  ---
Okay, thanks for the follow-up. Let's close this as a driver bug then.

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-27 Thread Merkurio 
https://bugs.kde.org/show_bug.cgi?id=504303

--- Comment #6 from Merkurio  ---
(In reply to Zamundaaa from comment #5)
> Then the display is definitely getting updated at 240Hz... Are you certain
> that there's no difference to 60Hz there? If so, then the only way I can
> imagine that happening is if the driver just skips 3/4 of frames somehow

Thank you very much for your help and guidance in ruling out potential issues.
It is indeed a problem related to the HDMI 2.1 protocol on Linux (and Nvidia in
this case) when using refresh rates higher than 120 Hz — as has also happened
to another person here with the same monitor I have but in a different desktop
environment:

https://forums.developer.nvidia.com/t/displayport-dsc-4k-240hz-flickering-artifacts/294490/18

Unfortunately, when switching to a DP cable, the 240 Hz issue is resolved and
it works correctly, but flickering artifacts are introduced (possibly due to
cable quality, DSC implementation, or something else), though this is no longer
a KDE Plasma-related issue.

Again, I really appreciate your patience!

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-26 Thread Zamundaaa 
https://bugs.kde.org/show_bug.cgi?id=504303

--- Comment #5 from Zamundaaa  ---
Then the display is definitely getting updated at 240Hz... Are you certain that
there's no difference to 60Hz there? If so, then the only way I can imagine
that happening is if the driver just skips 3/4 of frames somehow

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-24 Thread Merkurio 
https://bugs.kde.org/show_bug.cgi?id=504303

--- Comment #4 from Merkurio  ---
(In reply to Zamundaaa from comment #3)
> Ok, so my analysis tool says 8.5% of frames are dropped, which is not great,
> but also not bad enough to cause this.
> 
> The actual render times have a bunch of spikes, one even going up above
> 100ms - but apart from that, the data looks fine. Those spikes aside, the
> time between presentation timestamps is 4.16ms, which is exactly right for
> 240Hz.
> 
> If you run weston-presentation-shm, does the p2p number match? Should be
> somewhere around 4166 too.

It is around 4166 (for the most part):

   359: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4105 us, t2p   7853, [sce_], seq
0
   360: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4168 us, t2p   7696, [sce_], seq
0
   361: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4166 us, t2p   7916, [sce_], seq
0
   362: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4167 us, t2p   7910, [sce_], seq
0
   363: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4171 us, t2p   7904, [sce_], seq
0
   364: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4170 us, t2p   7910, [sce_], seq
0
   365: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4166 us, t2p   7868, [sce_], seq
0
   366: f2c  1 ms, c2p 12 ms, f2p 13 ms, p2p  8392 us, t2p  11992, [sce_], seq
0
   367: f2c  2 ms, c2p 10 ms, f2p 12 ms, p2p  4133 us, t2p  10559, [sce_], seq
0
   368: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4172 us, t2p   7873, [sce_], seq
0
   369: f2c  0 ms, c2p 10 ms, f2p 10 ms, p2p  5484 us, t2p   9255, [sce_], seq
0
   370: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  2874 us, t2p   7990, [sce_], seq
0
   371: f2c  0 ms, c2p  7 ms, f2p  7 ms, p2p  4152 us, t2p   6668, [sce_], seq
0
   372: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4158 us, t2p   7884, [sce_], seq
0
   373: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4181 us, t2p   7949, [sce_], seq
0
   374: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4152 us, t2p   7911, [sce_], seq
0
   375: f2c  1 ms, c2p 12 ms, f2p 13 ms, p2p  8357 us, t2p  12020, [sce_], seq
0
   376: f2c  1 ms, c2p 16 ms, f2p 17 ms, p2p  8324 us, t2p  16124, [sce_], seq
0
   377: f2c  1 ms, c2p 11 ms, f2p 12 ms, p2p  4163 us, t2p  10620, [sce_], seq
0
   378: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4162 us, t2p   7942, [sce_], seq
0
   379: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4177 us, t2p   7956, [sce_], seq
0
   380: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4121 us, t2p   7918, [sce_], seq
0
   381: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4166 us, t2p   7842, [sce_], seq
0
   382: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4167 us, t2p   7919, [sce_], seq
0
   383: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4166 us, t2p   7894, [sce_], seq
0
   384: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4176 us, t2p   7929, [sce_], seq
0
   385: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4157 us, t2p   7891, [sce_], seq
0
   386: f2c  1 ms, c2p 12 ms, f2p 13 ms, p2p  8374 us, t2p  11985, [sce_], seq
0
   387: f2c  2 ms, c2p 11 ms, f2p 13 ms, p2p  4160 us, t2p  10712, [sce_], seq
0
   388: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4171 us, t2p   7871, [sce_], seq
0
   389: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4164 us, t2p   7958, [sce_], seq
0
   390: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4167 us, t2p   7977, [sce_], seq
0
   391: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4166 us, t2p   7978, [sce_], seq
0
   392: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4169 us, t2p   7940, [sce_], seq
0
   393: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4172 us, t2p   7979, [sce_], seq
0
   394: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4161 us, t2p   7971, [sce_], seq
0
   395: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4169 us, t2p   7977, [sce_], seq
0
   396: f2c  0 ms, c2p 13 ms, f2p 13 ms, p2p  8353 us, t2p  12168, [sce_], seq
0
   397: f2c  1 ms, c2p 16 ms, f2p 17 ms, p2p  8306 us, t2p  16072, [sce_], seq
0
   398: f2c  2 ms, c2p 10 ms, f2p 12 ms, p2p  4168 us, t2p  10538, [sce_], seq
0
   399: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4169 us, t2p   7884, [sce_], seq
0
   400: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  5118 us, t2p   8844, [sce_], seq
0
   401: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  3235 us, t2p   8015, [sce_], seq
0
   402: f2c  1 ms, c2p  7 ms, f2p  8 ms, p2p  4142 us, t2p   6932, [sce_], seq
0
   403: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4182 us, t2p   7899, [sce_], seq
0
   404: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4164 us, t2p   7931, [sce_], seq
0
   405: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4161 us, t2p   7836, [sce_], seq
0
   406: f2c  1 ms, c2p  7 ms, f2p  8 ms, p2p  4168 us, t2p   7856, [sce_], seq
0
   407: f2c  1 ms, c2p 12 ms, f2p 13 ms, p2p  8336 us, t2p  12079, [sce_], seq
0
   408: f2c  2 ms, c2p 11 ms, f2p 13 ms, p2p  4165 us, t2p  10684, [sce_], seq
0
   409: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4172 us, t2p   7979, [sce_], seq
0
   410: f2c  0 ms, c2p  8 ms, f2p  8 ms, p2p  4167 us, t2p   8019, [sce_], seq
0
   411: f2c  1 ms, c2p  7 ms, f2p  8 ms, p2p  4207 us, t2p   7940, [sce_], seq
0
   412: f2c  1 ms, c2p  8 ms, f2p  9 ms, p2p  4159 us, t2p   7902, [sce_], seq
0

[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-23 Thread Zamundaaa 
https://bugs.kde.org/show_bug.cgi?id=504303

--- Comment #3 from Zamundaaa  ---
Ok, so my analysis tool says 8.5% of frames are dropped, which is not great,
but also not bad enough to cause this.

The actual render times have a bunch of spikes, one even going up above 100ms -
but apart from that, the data looks fine. Those spikes aside, the time between
presentation timestamps is 4.16ms, which is exactly right for 240Hz.

If you run weston-presentation-shm, does the p2p number match? Should be
somewhere around 4166 too.

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-19 Thread Merkurio 
https://bugs.kde.org/show_bug.cgi?id=504303

--- Comment #2 from Merkurio  ---
Created attachment 181538
  --> https://bugs.kde.org/attachment.cgi?id=181538&action=edit
240 Hz performance log

Here is the performance log.

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-19 Thread Zamundaaa 
https://bugs.kde.org/show_bug.cgi?id=504303

Zamundaaa  changed:

   What|Removed |Added

 Status|REPORTED|NEEDSINFO
 CC||[email protected]
 Resolution|--- |WAITINGFORINFO

--- Comment #1 from Zamundaaa  ---
Please set KWIN_LOG_PERFORMANCE_DATA=1 for KWin, restart, then use the system
for a minute or so at 240Hz, and upload the csv file KWin puts in your home
folder here.

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[kwin] [Bug 504303] 240 Hz monitor feels like 60 Hz system-wide

2025-05-16 Thread Nate Graham 
https://bugs.kde.org/show_bug.cgi?id=504303

Nate Graham  changed:

   What|Removed |Added

 CC||[email protected]

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